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30 December, 22:17

It takes 40 minutes for eight people to paint four walls how many minutes does it takes 10 people to paint seven walls

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  1. 30 December, 22:38
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    8r (40) = 4

    r=1/80 that is the rate for each person ...

    10rt=7 using r we found before

    10 (1/80) t=7

    t/8=7

    t=56 minutes.
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